Énay R, Howarth MK. Stevensites, Zittelites, and Gyrophylloceras, new generic names proposed for Stevensia Énay, 2009, Zittelia Tavera Benitez, 1985, and Gyrophyllites Wiedmann, 1963 (Mollusca: Ammonoidea). paleocontributions [Internet]. 2018 Apr. 19 [cited 2024 May 5];(19):1-2. Available from: https://journals.ku.edu/paleocontributions/article/view/20298